Diminished equilibrium magnetization in Hg-1223 and Tl-2212 superconductors with fission-generated columnar defects
نویسندگان
چکیده
منابع مشابه
I-V characteristics of high-temperature superconductors with columnar defects.
The vortex glass transition in the presence of columnar defects is studied by Monte Carlo simulations of a vortex loop model, suggested by the analogy to the T = 0 superconductor-insulator transition for dirty bosons in (2+1)D. From finite-size scaling analysis of the I-V characteristic we find two dynamical exponents describing the non-equilibrium behavior. We obtain z⊥ = 6±0.5 and z‖ = 4 ± 0....
متن کاملSystematic resistivity study of the pseudogap and critical temperature for ( Hg , Re ) - 1223 superconductors
After a detailed characterization of the (Hg,Re)-1223 polycrystalline samples, the pseudogap temperature T ∗, fluctuation temperature Tscf and the superconducting critical temperature Tc have been systematically studied through electrical resistivity ρ measurements by several different current densities. Performing many set of measurements with different current densities we show that, while lo...
متن کاملMicrowave vortex dynamics in Tl-2212 thin films
We present measurements of the effective surface impedance changes due to a static magnetic field, ∆Z(H, T ) = ∆R(H, T ) + i∆X(H, T ), in a Tl-2212 thin film with Tc > 103 K, grown on a CeO2 buffered sapphire substrate. Measurements were performed through a dielectric resonator operating at 47.7 GHz, for temperatures 60 K≤ T < Tc and magnetic fields ≤ 0.8 T. We observe exceptionally large field...
متن کاملVortex dynamics in high-Tc superconductors with sparse weak columnar defects
We have performed large-scale dynamical simulations on the current-driven three-dimensional frustrated anisotropic XY model with sparse weak columnar defects. Below the matching field, a moving Bose glass phase with superconducting coherence but without spatial order is observed at low temperatures. For very small columnar defect concentrations, a moving Bragg glass phase with both superconduct...
متن کاملVortex state microwave resistivity in Tl - 2212 thin
We present measurements of the field induced changes in the 47 GHz complex resistivity, ∆ρ̃(H,T ), in Tl2Ba2CaCu2O8+x (TBCCO) thin films with Tc ≃ 105 K, prepared on CeO2 buffered sapphire substrates. At low fields (μ0H <10 mT) a very small irreversible feature is present, suggesting a little role of intergranular phenomena. Above that level ∆ρ̃(H,T ) exhibits a superlinear dependence with the fi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 2003
ISSN: 0921-4534
DOI: 10.1016/s0921-4534(02)02534-0